T Bracket for T Slot Tables

I saw another simple T Bracket for T Slot style tables, but I had an idea to add bosses at the bottom that would fit down in the channels of my Mostly Printed CNC Router's T Slot table. They are a snug fit and provide 0 lateral movement in the x and y direction even prior to being clamped down. Also this doubles as a bed to workpiece alignment tool for flat or square materials.

The slots and bosses are 0.25 in, and so I attach them via an inverted 1/4-20 carriage bolt and this Knob: http://www.thingiverse.com/thing:1381045 I designed for 1/4-20 hex nuts.

Added two other versions with Horizontal or Vertical Tabs only for infinite adjustability.